» Wed Dec 07, 2011 6:59 am
The reason could that :
Your PSN ID is on the US PSN store, therefore if your game is bought is Uk your US PSN ID will not recognise it. You need a UK account for your code to work; and to do so, you just need to create an ID on the UK store and it will work.
I'm 99% this is the problem, so another solution is to trade your code for one of your region so that you can use it on your main account, I'm sure you'll find someone, there's a lot of people who bought the game on day 1 and have never used the code.